Cascading DropDownLists

HTML

<script src="http://cdn.kendostatic.com/2011.2.804/js/kendo.all.min.js"></script>
<link rel="stylesheet" href="http://cdn.kendostatic.com/2011.2.804/styles/kendo.common.min.css">
<link rel="stylesheet" href="http://cdn.kendostatic.com/2011.2.804/styles/kendo.kendo.min.css">
<script src="http://getfirebug.com/firebug-lite-debug.js"></script>
supplier: <input id="suppliers"/>
product: <input id="products"/>

JavaScript

var productsDataSource = new kendo.data.DataSource({
    type: "odata",
    serverFiltering: true,
    transport: {
        read: "http://services.odata.org/Northwind/Northwind.svc/Products"
    }   
});

$("#products").kendoDropDownList({
    autoBind: false,
    dataTextField: "ProductName",
    dataValueField: "ProductID",
    dataSource: productsDataSource
});

$("#suppliers").kendoDropDownList({
    autoBind: false,
    dataTextField: "CompanyName",
    dataValueField: "SupplierID",
    dataSource: {
        type: "odata",
        serverFiltering: true,
        transport: {
            read: "http://services.odata.org/Northwind/Northwind.svc/Suppliers"
        }
    },
    change: function() {
        productsDataSource .filter({
            field: "SupplierID",
            operator: "eq",
            value: parseInt(this.value())
        });
    }
});

var suppliersValue = $("#suppliers").data("kendoDropDownList").value();
var productsValue = $("#products").data("kendoDropDownList").value();

console.log("suppliers: " + suppliersValue );
console.log("products: " + productsValue );